You can change the diameter with an insert for $50-60. He also suggested increasing the nozzle size to 100mm with their posinosle. He did some sort of calculation, or looked into the magic eight ball, or something and suggested the overlap impeller for the front at 19deg, the middle at 22 degrees and the rear at 24 degrees. He we adamant that upgrading to a progressive pitch system and increasing my nozzle size would absolute improve my load handling ability again as much as just the KEM suggested upgrade. Schlagel Marine was incredibly helpful as well. It was worth the money for the phone call just to listen to their accent on the answering machine. I actually tried to call Scott Jet in New Zealand, but they did not pick up the phone. Then, I called Schlagel Marine in Boise, a Scott Jet dealer. I think my hole shot is better now and I am running about 100 RPM less. I noticed a big difference in the boat handling immediately with the posinosle. I only had to buy one impeller and I filed down two of the 19's to knock the burrs off. It came down to money in the end, and I opted for the KEM suggested upgrades as well as their posinosle at 92mm. I talked to Professional Marine, and Mike had all sorts of good suggestions. I was convinced not to put that in by everybody I talked to about it. The intake grate has wider slats to let in more water, but will let in bigger rocks too. Kodiak (KEM) suggests that the biggest gain to be made for the 350 type motor is to change out the rear impeller for a 24degree and change the intake grate.
I had 3 worn but functional brass impellers.
Set-up: Kodiak 3 stage, Kodiak 351, 20.5 Xtraplus with 60" bottom. The most consistent answer is "see what happens and go from there". Here is what I have found out, but sources vary. It was suggested that I start a new thread.
#BBC N OZZLE SIZE PLUS#
There was some interest in a discussion on my last post about Impeller pitch for my Extra Plus load testing.
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